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UNITED STATES PATENT FFIOE.

V. O. BALGOM, OF BEDFORD, AND C. H. HILL, OF BILLERICA, MASSACHUSETTS.

ENGINE FOR G-R-INDING PAPER-STOCK.

Specicaton of Letters Patent No. 16,162, dated December 2, 1856.

To all whom t may concern:

Be it known that we, VEsrAsiAN O. BAL- ooir, of Bedford, and CHARLES H. HiLL, of Billerica, both in the county of Middlesex and Commonwealth of Massachusetts, have invented a novel and useful Improvement in Engines for Grinding, Pulverizing, and Separating the Fibers of Paper-Stock and for any other desired purpose; and we hereby declare that the following specification, in connection with the accompanying drawings and references thereon, constitute a lucid, clear, and exact description of the construction and use of the same.

l In referring to said drawings Iiigure l denotes a plan or top view. Fig. 2, a side elevation of the same. Fig. 3 a longitudinal and vertical section on line A, B, Fig. 1.

Invention-Our invention consists of revolving the tub in which the paper stock or other article is to be ground or pulverized, and revolving a grooved cylinder or grinding cylinder within this tub and at a greater speed than the movement of the surface of the tub next to or under this roll in order to nicely separate and draw out the fibers of the stock being ground, and at the same time leaving these bers the greatest possible length, also in placing a secondary smooth roll also into the tub, and which is revolved with and at the same time and speed of the tub by the revolving of the tub, as will be hereafter seen.

Uonstructz'on.-To enable persons skilled in the art to which our invention appertains to construct and carry out the same we will describe it as follows. le construct a wood frame as seen at A, A, in the drawing to which we attach a secondary frame seen at B. We then construct a revolving tub of metal or any suitable substance, which must be firmly fastened to the perpendicular shaft T, which turns or revolves in the bearings A2 and D2, on the lower portion of the shaft T. 7e attach a bevel gear seen at Z which is geared into and driven by the bevel pinion Y on the inner end of the shaft IV which turns in the bearing X, on the out end of the shaft W we place the driving pulley M which propels or drives the machine.

The revolving tub contains the paper stock or other article being ground, as seen at O2 C2 Fig. 3, and the liquid B2, above the tub we suspend in the bearing Q, Q, on the plates O and D which are fastened to the frame A by the screws z', z', a grooved grinding cylinder G, grooved as seen at H, and its edges I, which is fastened to the shaft L, the periphery of the cylinder G is made to turn faster than the bottom of the tub E with which the grinding cylinder Gr comes in contact. By means of the gears N on the shaft L, and gear O on the stud V which is held to the frame A by the screw V and the gear P, which is fastened to the drive shaft lV, by which the motion is also communicated to the tub E, and so as to revolve the periphery of the grinding cylinder faster than that portion of the tub immediately under it in order to first tear the stock apart and then reduce it to the desired ineness, with great rapidity and then even and straighten the iibers, and leave them, with great rapidity of much greater length than by any other machine or engine ever before known, which greatly improves the quality and strength of the paper, as will be readily understood.

lVe construct cylinder for evening seen at J, with a smooth periphery and which is fastened to the shaft K which turns in the boxes Q, Q, they being so weighted as to press down this cylinder J by means of the levers B, B, and springs S, S, attached to their out ends, which constantly press them down, and of course the cylinders on which they act. One of the boxes of the grooved grinding cylinder G, being provided with a lever and spring or weight to press it down with sufiicient force to grind the stock.

Through the bottom of the revolving tub we form a hole of suitable size, to which we fit a valve F, water tight, and so that when it is withdrawn the liquid or pulp, or both, as seen at B2, will discharge itself from this tub as will be seen by inspection of Fig. 3.

lV hat we claim as our invention, and desire to secure by Letters Patent, is-

The revolving pulp tub E, or its mechanical equivalent, in combination with the grooved grinding roller G revolved therein, at a greater or dierent speed than this tub. Also the combination of the revolving pulp tub E and friction or evening roller J, arranged and operated essentially in the manner and for the purpose fully set forth.

vi-isPAsiAN o. BALooM. oi-ias. H. HiLL.

Witnesses BENJ. ROBINSON, E. W. SCOTT. 

